I played on the default graphic settings yeah. It's windowed, high quality and every box ticked except ultrawide. The game runs smoothly on my computer, the frame only drops when I zoom out too much. I crashed once when I was playing the first level, and a couple times on the 3rd.
Spent a few hours going through hard mode without any hints. Full cleared only the first 4 levels lol. The full game is definitely going to take a while.
One issue I came across is the game would randomly crash after playing for a while.